Thread: database system identifier differs between the primary and standby

database system identifier differs between the primary and standby

From
rajibdk
Date:
Hello List,

We are getting the following log while configuring hot standby,

2011-04-20 17:34:40 ETC/GMT FATAL:  the database system is starting up
2011-04-20 17:34:41 ETC/GMT FATAL:  database system identifier differs
between the primary and standby
2011-04-20 17:34:41 ETC/GMT DETAIL:  The primary's identifier is
5592072752411433371, the standby's identifier is 5597615802844953578.

PostgreSQL Version: 9.0.2

Prymary configuration:
wal_level = 'hot_standby'  - postgresql.conf
host    replication     all       x.x.x.x/24          trust – pg_hba.conf

Secondary configuration:
Hot_standby=off – postgresql.conf
standby_mode = 'on' – recovery.conf
primary_conninfo = 'host=10.20.9.181 port=5432' – recovery.conf

Please suggest on the above log O/P.

Regards,
Rajib


Rajib Deka
SIEMENS Ltd.
Robert V Chandran Tower, First Floor, West Wing,
#149, Velechery Tambaram Main Road, Pallikaranai, Chennai-100, INDIA.
www.siemens.com

Mob: +91-9176780669 | E-Mail: rajib.deka@siemens.com



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Re: database system identifier differs between the primary and standby

From
Simon Riggs
Date:
On Wed, Apr 20, 2011 at 2:13 PM, rajibdk <rajib.deka@siemens.com> wrote:

> We are getting the following log while configuring hot standby,
>
> 2011-04-20 17:34:40 ETC/GMT FATAL:  the database system is starting up
> 2011-04-20 17:34:41 ETC/GMT FATAL:  database system identifier differs
> between the primary and standby
> 2011-04-20 17:34:41 ETC/GMT DETAIL:  The primary's identifier is
> 5592072752411433371, the standby's identifier is 5597615802844953578.

Please refer to
http://www.postgresql.org/docs/9.0/static/warm-standby.html#STANDBY-SERVER-SETUP
http://www.postgresql.org/docs/9.0/static/continuous-archiving.html#BACKUP-PITR-RECOVERY

You might also want to look at the recent Postgres book that has a
detailed chapter on Replication:
http://www.2ndquadrant.com/books/postgresql-9-admin-cookbook/

--
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

Looks like you have set the wrong host information in recovery.conf file or there is a mistake in recovery.conf file. Please check your recovery.conf file. 

May be postgres should throw a correct message to the logs saying the host information for replication is wrong or something meaningful to understand instead of "database system identifier differs between the primary and standby"

Thanks
Deepak

On Wed, Apr 20, 2011 at 8:57 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
On Wed, Apr 20, 2011 at 2:13 PM, rajibdk <rajib.deka@siemens.com> wrote:

> We are getting the following log while configuring hot standby,
>
> 2011-04-20 17:34:40 ETC/GMT FATAL:  the database system is starting up
> 2011-04-20 17:34:41 ETC/GMT FATAL:  database system identifier differs
> between the primary and standby
> 2011-04-20 17:34:41 ETC/GMT DETAIL:  The primary's identifier is
> 5592072752411433371, the standby's identifier is 5597615802844953578.

Please refer to
http://www.postgresql.org/docs/9.0/static/warm-standby.html#STANDBY-SERVER-SETUP
http://www.postgresql.org/docs/9.0/static/continuous-archiving.html#BACKUP-PITR-RECOVERY

You might also want to look at the recent Postgres book that has a
detailed chapter on Replication:
http://www.2ndquadrant.com/books/postgresql-9-admin-cookbook/

--
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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